Table 3

Global test of support for Ornstein-Uhlenbeck (O-U) models of shifts in environmental conditions

Clade

sqrt (Altitude)

ln (Precipitation)

ln (Emberger Index)

Min Temp

Max Temp


error = 0


1

0.29978

0.60730

0.75952

0.12975

0.15825

2

0.16626

0.90511

0.90077

0.17785

0.17675

3

0.26579

0.52435

0.44646

0.76296

0.11206

4

0.52548

0.56360

0.76298

0.14681

0.30656

5

0.11212

0.49581

0.42547

0.98678

0.14469


error = estimated squared standard error


1

0.31380

0.63645

0.80282

0.12743

0.00213

2

0.33394

0.89657

0.89803

0.11836

0.00327

3

0.62014

0.48266

0.40712

0.97213

0.00208

4

0.69243

0.58770

0.80586

0.13598

0.00518

5

0.17833

0.46473

0.39064

0.99029

0.00262


For each variable, 33 models were evaluated: 32 O-U models comprising all 2^5 possible models allowing or disallowing shifts in equilibrium value at the base of the 5 focus clades; and the Brownian motion (constant variance) model. Values in each cell are Bayes information criterion (BIC) weights summed over all models allowing a change at the node indicated. This estimates the posterior probability that there was a shift in environmental conditions at the base of the clade estimated integrating over all models evaluated. Measurement error for the lower portion of the table was estimated as indicated in the text.

Lumbsch et al. BMC Evolutionary Biology 2008 8:257   doi:10.1186/1471-2148-8-257

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